Ответ:
- \(3(x-2)=x+2\)
\(3x-6=x+2\)
\(2x=8\)
\(x=4\). - \(5-2(x-1)=4-x\)
\(5-2x+2=4-x\)
\(3=x\)
\(x=3\). - \((7x+1)-(9x+3)=5\)
\(7x+1-9x-3=5\)
\(-2x-2=5\)
\(-2x=7\)
\(x=-3,5\). - \(3.4+2.3y=7(y-2.3)\)
\(3.4+2.3y=7y-16.1\)
\(19.5=4.7y\)
\(y=\frac{195}{47}\). - \(0.27-(2-y)=2.3-0.3(y-6)\)
\(y-1.73=4.1-0.3y\)
\(1.3y=5.83\)
\(y=\frac{583}{130}=4.484615\ldots\). - \(\frac{2}{3}(\frac{1}{3}x-\frac{1}{2})=4x+2\frac{1}{2}\)
Умножим на 6:
\(2(\frac{x}{3}-\frac{1}{2})=24x+15\)
\(\frac{2x}{3}-1=24x+15\)
\(-16=\frac{70x}{3}\)
\(x=-\frac{24}{35}\).
Ответ: 1) \(x=4\); 2) \(x=3\); 3) \(x=-3,5\); 4) \(y=\frac{195}{47}\); 5) \(y=\frac{583}{130}\); 6) \(x=-\frac{24}{35}\).
